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  2. Vocal range - Wikipedia

    en.wikipedia.org/wiki/Vocal_range

    Vocal range. Vocal range is the range of pitches that a human voice can phonate. A common application is within the context of singing, where it is used as a defining characteristic for classifying singing voices into voice types. [1] It is also a topic of study within linguistics, phonetics, and speech-language pathology, particularly in ...

  3. Word frequency effect - Wikipedia

    en.wikipedia.org/wiki/Word_frequency_effect

    The word frequency effect is a psychological phenomenon where recognition times are faster for words seen more frequently than for words seen less frequently. [1] Word frequency depends on individual awareness of the tested language. [2] The phenomenon can be extended to different characters of the word in non-alphabetic languages such as Chinese.

  4. Extremely low frequency - Wikipedia

    en.wikipedia.org/wiki/Extremely_low_frequency

    Alternative definitions. ELF is a subradio frequency. [14] Some medical peer reviewed journal articles refer to ELF in the context of "extremely low frequency (ELF) magnetic fields (MF)" with frequencies of 50 Hz [15] and 50–80 Hz. [16] United States Government agencies, such as NASA, describe ELF as non-ionizing radiation with frequencies ...

  5. Zipf's law - Wikipedia

    en.wikipedia.org/wiki/Zipf's_law

    A plot of the frequency of each word as a function of its frequency rank for two English language texts: Culpeper's Complete Herbal (1652) and H. G. Wells's The War of the Worlds (1898) in a log-log scale. The dotted line is the ideal law y ∝ 1/x.

  6. Pitch (music) - Wikipedia

    en.wikipedia.org/wiki/Pitch_(music)

    In musical notation, the different vertical positions of notes indicate different pitches. Play top: Play bottom: Pitch is a perceptual property that allows sounds to be ordered on a frequency-related scale, [1] or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies. [2]

  7. Electromagnetic spectrum - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_spectrum

    Electromagnetic spectrum. The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band. From low to high frequency these are: radio waves, microwaves, infrared, visible light ...

  8. Sonority hierarchy - Wikipedia

    en.wikipedia.org/wiki/Sonority_hierarchy

    A sonority hierarchy or sonority scale is a hierarchical ranking of speech sounds (or phones). Sonority is loosely defined as the loudness of speech sounds relative to other sounds of the same pitch, length and stress, [1] therefore sonority is often related to rankings for phones to their amplitude. [2] For example, pronouncing the vowel [a ...

  9. Word list - Wikipedia

    en.wikipedia.org/wiki/Word_list

    It includes the F.F.1 list with 1,500 high-frequency words, completed by a later F.F.2 list with 1,700 mid-frequency words, and the most used syntax rules. [11] It is claimed that 70 grammatical words constitute 50% of the communicatives sentence, [12] [13] while 3,680 words make about 95~98% of coverage. [14] A list of 3,000 frequent words is ...